linux-kernel - Re: [PATCH 1/2] ARM: debug: Add CLSP711X

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Date:	Mon, 19 Sep 2011 15:55:10 -0700
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
CC:	Will Deacon <will.deacon@....com>, Arnd Bergmann <arnd@...db.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 1/2] ARM: debug: Add CLSP711X_UART1 config choice

On 09/19/11 15:41, Russell King - ARM Linux wrote:
> On Mon, Sep 19, 2011 at 03:12:04PM -0700, Stephen Boyd wrote:
>> On 09/19/11 14:25, Will Deacon wrote:
>>> Thanks for cooking the patch, it was somewhere on my list of things to do
>>> this week! I think we also need to fix the DEBUG_DC21285_PORT option as that
>>> has a similar `if not selected then use a different UART' behaviour. It can be
>>> fixed in the same way as you have done in this patch.'
>> Ah my eyes glossed over the DC21285 one. Here's one on top of patch 2.
>> Feel free to squash, etc.
> Err, the DC21285 only has one serial port.
>
> Some footbridge platforms expose the DC21285 to the outside world, others
> don't.  Some footbridge platforms have a separate 8250 UART at the standard
> PCI COM1 address, others don't.
>
> What DEBUG_DC21285_PORT is selecting between is whether to use the DC21285
> port (when set) or the 8250 at PCI COM1 (when unset).

Ah ok. How about this instead?

diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 9661c51..31896f4 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -93,14 +93,19 @@ choice
                  It does include a timeout to ensure that the system does not
                  totally freeze when there is nothing connected to read.
 
+       config DEBUG_FOOTBRIDGE_COM1
+               bool "Kernel low-level debugging messages via footbridge 8250 at PCI COM1"
+               depends on FOOTBRIDGE
+               help
+                 Say Y here if you want the debug print routines to direct
+                 their output to the 8250 at PCI COM1.
+
        config DEBUG_DC21285_PORT
                bool "Kernel low-level debugging messages via footbridge serial port"
                depends on FOOTBRIDGE
                help
                  Say Y here if you want the debug print routines to direct
                  their output to the serial port in the DC21285 (Footbridge).
-                 Saying N will cause the debug messages to appear on the first
-                 16550 serial port.
 
        config DEBUG_CLPS711X_UART1
                bool "Kernel low-level debugging messages via UART1"



-- 
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

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